a law enforcement source says images two of men seen near the finish line are being circ circulated. we'll update with the latest information. back to you. >>> a young victim from martinez is one step closer to home tonight. >> she under went a two-hour surgery today. she was hit by shrapnel by one of the bombs monday. >>> a battery apparently used as an ignition source to detonate one bomb is manufactured in california >> reporter: let me show you what we're talking about. this is the battery we're talking about they say is mostly used by hobby enthusiasts for radio controlled cars, the same nickel metal hydro chemistry you see in double a batteries. >> the company vice president's a shock when he checked the news. >> i was appalled when i saw this, this morning, once i saw the picture on the page i contacted the boston police department, as well as the fbi. >> he says the sub-c size the batteries are sold to hobbyists for remote control cars, accurate ail stores and online, in the united states and overseas. >> this is to bring joy to children, and to be used in such a terrible way